Horizontal Processor Section - Kortek KTN-2001 Service Manual

KORTEK Corporation
KTN-2001/1401

6-5 HORIZONTAL PROCESSOR SECTION

IC301 (TDA2595) is the device designed to operate without SYNC supplied from outside
by means of the output of horizontal frequency upon free running with the oscillation of
the built-in OSC.
IC301 is to be operated by the supplied 12V voltage with PIN No 15.
Horizontal oscillating frequency is determined with PIN 16 and PIN 14 upon free running
(Free running frequency is determined by R308 and C304).
PIN 17 is acting a role to compare SYNC phase input from outside and built-in OSC phase,
and coincide them, which is mainly done by C308, C309, R306, R307 and is assured by
adjustment of DC level with VR302. Generally connecting voltage is controlled within the
range of 3.5~3.8V.
PIN 11 is input terminal of horizontal SYNC, separate SYNC by receiving of composite
signal and send output by amplification.
PIN 5 is GND of IC301.
PIN 1, 6, 7, 9, 8 is NC terminal.
PIN 2 controls by receiving of fly-back pulse input, compare and detect pulse from No 6
terminal of FBT by feedback, and operate in the sequence of pulse detection, comparison
output and feedback so that high voltage is always maintained constant.
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